# System User A new MiVoice Office 400 CCS installation includes a default System User. This user has the username 'systemuser' and the password 'systemuser'. Once you have installed the MiVoice Office 400 CCS we recommend you change this default set up. You have two options, change the password of the default System User, or change the designated System User to a new User altogether. For either option you must log on first to the MiVoice Office 400 CCS Supervisor App using the default System User username and password. Then open the MiVoice Office 400 CCS Administrator App, follow this link to see how to do this. In the MiVoice Office 400 CCS Administrator App choose the Users tab. If you are happy to just change the default System User password, all you need to do is select the User 'systemuser' from the drop down list, enter a new password with confirmation, enter the default password ('systemuser') and then click the Apply button. Follow this link for more details of this process.